Volcano

Question 1

> is a natural opening or vents in the surface of the Earth (Earth’s Crust) where molten rocks, hot gases, smoke, and ash are ejected.
is a mountain that opens downward to a pool of molten rock (magma) below the surface of the earth

Answer 1

Volcano

Question 2

Characteristics of a volcano

Answer 2

It is a mountain
It has a crater on the top
An opening in the Earth’s surface
It gives up a hot lava or gases
It can be found in land and water

Question 3

OUTER PARTS OF A VOLCANO

Answer 3

SUMMIT
SLOPE
BASE

Question 4

peak or highest point of a volcano. At here, there is an opening which may either be a crater or a caldera.

Answer 4

Summit

Question 5

is a tunnel-shaped opening at the top of a volcano

Answer 5

Crater

Question 6

is formed when a part of the wall collapses following an explosive eruption.

Answer 6

Caldera

Question 7

degree of slant; inclination of a volcano

Answer 7

Slope

Question 8

bottom part of a volcano where it stands

Answer 8

Base

Question 9

TYPES OF VOLCANO
ACCORDING TO VOLCANIC ACTIVITY (PHIVOLCS)

Answer 9

ACTIVE VOLCANO
INACTIVE VOLCANO
DORMANT VOLCANO
EXTINCT VOLCANO

Question 10

are those that have a record of eruption within the last 600 years or those that erupted 10, 000 years ago based on analysis of their materials.

Answer 10

ACTIVE VOLCANO

Question 11

Examples: (Active)

Answer 11

Mt. Mayon (Bicol)
Mt. Taal (Batangas) and
Mt. Pinatubo Zambales)

Question 12

are those that have not erupted for the last 10, 000 years and their physical form is being changed by agents of weathering and erosion through formation of deep and long gullies.

Answer 12

INACTIVE VOLCANO

Question 13

Examples: (Inactive)

Answer 13

Mt. Cabaluyan (Pangasinan)
Mt. Cocoro (Palawan)
Mt. Tamburok (Leyte)

Question 14

are those that have not erupted for the last 10, 000 years and their physical form is being changed by agents of weathering and erosion through formation of deep and long gullies but may erupt sooner or later.

Answer 14

DORMANT VOLCANO

Question 15

are those that have not erupted or erupted for the last 10, 000 years and their physical form is being changed by agents of weathering and erosion through formation of deep and long gullies but may NOT erupt until a long period of time.

Answer 15

EXTINCT VOLCANO

Question 16

is also called as scoria cone. Is that the simplest, most typical type, and features a characteristic conoid.

Answer 16

CINDER CONE

Question 17

Cinder Cones are Characterized by?

Answer 17

narrow base and steep slope

Question 18

Examples: (Cinder)

Answer 18

Paricutin in Mexico, Taal in Batangas

Question 19

observed as strato-volcanoes, it includes a number of the world’s grandest mountains.
A tall conical mountain composed of an alternating layer of lava-flow,

Answer 19

COMPOSITE VOLCANO

Question 20

Composite are formed and characterized by?

Answer 20

formed from alternate solidification of lava and cinders characterized by large and symmetrical slope.

Question 21

Examples: (Composite)

Answer 21

Fujiyama, Mt. Mayon (Bicol) and Kanlaon in (Negros Occ. )

Question 22

are huge, gently sloped volcanoes that just about exclusively erupts basaltic lava and include a number of the biggest volcanoes within the world. it’s built by many layers of low-viscous lava flows.

Answer 22

SHIELD VOLCANO

Question 23

Shield is formed by?

Answer 23

formed by accumulation of lava resulting in a broad, slightly domed structure that resembles a warrior’s shield

Question 24

Examples: (Shield)

Answer 24

Kilauea and Mauna Loa (Hawaiian Island)

Question 25

FACTORS AFFECTING VOLCANO'S ERUPTIVE SYLES AND VISCOSITY OF MAGMA

Answer 25

> Magma's temperature • Chemical composition (Silica content) > Amount of dissolved gases

Question 26

the property of the material's resistance to flow. It is also described as the liquid's thickness and stickiness.

Answer 26

VISCOSITY

Question 27

Magmas with high silica content are more viscous than those with low silica content.

Answer 27

CHEMICAL COMPOSITION

Question 28

Other factors being equal, gas (mainly water vapor) dissolved in magma tends to increase its ability to flow.

Answer 28

AMOUNT OF DISSOLVED GASES

Question 29

TYPES OF VOLCANIC ERUPTIONS

Answer 29

Phreatic or hydrothermal Strombolian Phreatomagmatic Vulcanian Plinian

Question 30

is a stream-driven eruption as the hot rocks come in contact with water. It is shortlived, characterized by ash columns but may be an onset of a larger eruption.

Answer 30

Phreatic or hydrothermal Mt. Taal

Question 31

a violent reaction due to the contact between water and magma. As a result, a large column of very fine ash and high-speed and sideway emission of pyroclastic called base surges are observed.

Answer 31

Phreatomagmatic Mt. Kanlaon

Question 32

A periodic weak to violent eruption characterized by fountain lava.

Answer 32

Strombolian Mt. Irazu

Question 33

characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ashfall tephra.

Answer 33

Vulcanian Mt. Paricutin

Question 34

excessively explosive type of eruption of gas and pyroclastics.

Answer 34

Plinian Mt. St. Helens

Question 35

The earth is believed to be extremely hot from within. Earth's interior is a source of energy called?

Answer 35

GEOTHERMAL ENERGY

Question 36

The heat of the Earth warms up water which is trapped in rock formations beneath its surface.

Answer 36

GEOTHERMAL ENERGY

Question 37

Geothermal energy is generated in two ways:

Answer 37

Geothermal powerplants Geothermal heat pumps

Question 38

the heat from deep inside the Earth is used to produce steam to generate electricity

Answer 38

Geothermal powerplants

Question 39

use the heat coming from close to the Earth's surface to heat water or provide heat for buildings.

Answer 39

Geothermal heat pumps